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Re: [Xen-devel] guest kexec / domU boot loader

On 10 Mar 2006, at 10:53, Gerd Hoffmann wrote:

Is it possible to move those magic pages to a different place in guest
physical memory?  With and without auto_translated_physmap?

As you say, without auto_translated_physmap it's up to the guest if/where he puts those pages in his physmap. He has control of the p2m and m2p mappings.

With auto_translate, you should use the new MEMOP_add_to_physmap call. It allows you to move shared_info and grant_table pages around in the physmap space (if you call and they already have a mapping, the old mapping goes away). I could also add a gpfn special value to have them removed from the physmap entirely (maybe useful for kexec?).

 -- Keir

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